dominated convergence theorem
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21: 18.2 General Orthogonal Polynomials
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►Markov’s theorem states that
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►This says roughly that the series (18.2.25) has the same pointwise convergence behavior as the same series with , a Chebyshev polynomial of the first kind, see Table 18.3.1.
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►Part of this theorem was already proved by Blumenthal (1898).
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►See Szegő (1975, Theorem 7.2).
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22: 17.18 Methods of Computation
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►Method (1) is applicable within the circles of convergence of the defining series, although it is often cumbersome owing to slowness of convergence and/or severe cancellation.
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►Method (1) can sometimes be improved by application of convergence acceleration procedures; see §3.9.
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23: 10.74 Methods of Computation
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►In other circumstances the power series are prone to slow convergence and heavy numerical cancellation.
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►Newton’s rule is quadratically convergent and Halley’s rule is cubically convergent.
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►To ensure that no zeros are overlooked, standard tools are the phase principle and Rouché’s theorem; see §1.10(iv).
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24: 30.10 Series and Integrals
25: 10.44 Sums
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§10.44(i) Multiplication Theorem
… ►§10.44(ii) Addition Theorems
►Neumann’s Addition Theorem
… ►Graf’s and Gegenbauer’s Addition Theorems
…26: 18.39 Applications in the Physical Sciences
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►An important, and perhaps unexpected, feature of the EOP’s is now pointed out by noting that for 1D Schrödinger operators, or equivalent Sturm-Liouville ODEs, having discrete spectra with eigenfunctions vanishing at the end points, in this case see Simon (2005c, Theorem 3.3, p. 35), such eigenfunctions satisfy the Sturm oscillation theorem.
…Both satisfy Sturm’s theorem.
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►Interactions between electrons, in many electron atoms, breaks this degeneracy as a function of , but still dominates.
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27: 1.5 Calculus of Two or More Variables
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Implicit Function Theorem
… ►§1.5(iii) Taylor’s Theorem; Maxima and Minima
… ►§1.5(iv) Leibniz’s Theorem for Differentiation of Integrals
… ►Suppose also that converges and converges uniformly on , that is, given any positive number , however small, we can find a number that is independent of and is such that … ►whenever both repeated integrals exist and at least one is absolutely convergent. …28: 15.2 Definitions and Analytical Properties
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►On the circle of convergence, , the Gauss series:
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(b)
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Converges absolutely when .
Converges conditionally when and is excluded.
29: 16.2 Definition and Analytic Properties
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►When the series (16.2.1) converges for all finite values of and defines an entire function.
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►If none of the is a nonpositive integer, then the radius of convergence of the series (16.2.1) is , and outside the open disk the generalized hypergeometric function is defined by analytic continuation with respect to .
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►On the circle the series (16.2.1) is absolutely convergent if , convergent except at if , and divergent if , where
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30: 18.33 Polynomials Orthogonal on the Unit Circle
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18.33.23
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